Tip cables are typically 100 pair cables comming from a splice with a larger cable. For management purposes I would genneraly recommend separate splice enclosures for each of the 900 and 1200 pair cables but nothing says they cannot be combined into a single larger splice booth. The use of 100 pair cables is allow easier handling and termination of tese cables in the utility hut.
Depending on the manufacturer, there should also be spares in the 900 and 1200 pair cables and are not spliced through except as needed for bad pairs. It is also important to bond the shields from the 900 pair and 12 pair cables to their respective tip cables.
Last in the utility hut, provide electrical protection (lightning, high voltage, etc) as close to the point of entry as possible with properly rated protectors.
Splice boot, splice connectors, and bonding harnesses are available from 3M as well as other manufacturers. The boot must be sized to the splice and fitted with the proper end caps to handle the truck (900 and/or 1200 pair) and tip cables (100 pair). If the splice is made in a wet location, there are also gel filled splice connectors made for these environments.
Joseph Golan, RCDD